PSound Class Reference

#include <sound.h>

Inheritance diagram for PSound:

List of all members.

Construction
	PSound (unsigned numChannels=1, unsigned sampleRate=8000, unsigned bitsPerSample=16, PINDEX bufferSize=0, const BYTE *data=NULL)
	PSound (const PFilePath &filename)
PSound &	operator= (const PBYTEArray &data)
Public Member Functions
File functions
PBoolean	Load (const PFilePath &filename)
PBoolean	Save (const PFilePath &filename)
Access functions
PBoolean	Play ()
	Play the sound on the default sound device.
PBoolean	Play (const PString &device)
	Play the sound to the specified sound device.
void	SetFormat (unsigned numChannels, unsigned sampleRate, unsigned bitsPerSample)
unsigned	GetEncoding () const
unsigned	GetChannels () const
	Get the number of channels (mono/stereo) in the sound.
unsigned	GetSampleRate () const
	Get the sample rate in samples per second.
unsigned	GetSampleSize () const
	Get the sample size in bits per sample.
DWORD	GetErrorCode () const
	Get the platform dependent error code from the last file load.
PINDEX	GetFormatInfoSize () const
	Get the size of the platform dependent format info.
const void *	GetFormatInfoData () const
	Get pointer to the platform dependent format info.
Static Public Member Functions
Miscellaneous functions
static PBoolean	PlayFile (const PFilePath &file, PBoolean wait=PTrue)
static void	Beep ()
	Play the "standard" warning beep for the platform.
Protected Attributes
unsigned	encoding
	Format code.
unsigned	numChannels
	Number of channels eg mono/stereo.
unsigned	sampleRate
	Samples per second.
unsigned	sampleSize
	Number of bits per sample.
DWORD	dwLastError
	Last error code for Load()/Save() functions.
PBYTEArray	formatInfo
	Full info on the format (platform dependent).

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Detailed Description

A class representing a sound. A sound is a highly platform dependent entity that is abstracted for use here. Very little manipulation of the sounds are possible.

The most common sound to use is the static function Beep()# which emits the system standard "warning" or "attention" sound.

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Constructor & Destructor Documentation

PSound::PSound	(	unsigned	numChannels = 1,
		unsigned	sampleRate = 8000,
		unsigned	bitsPerSample = 16,
		PINDEX	bufferSize = 0,
		const BYTE *	data = NULL
	)

Create a new sound, using the parameters provided. It is expected that the "lowest common denominator" encoding, linear PCM, is used.

All other values for the encoding are platform dependent.

Parameters:

numChannels	Number of channels eg mono/stereo
sampleRate	Samples per second
bitsPerSample	Number of bits per sample
bufferSize	Size of data
data	Pointer to initial data

PSound::PSound

(

const PFilePath &

filename

)

Create a new sound, reading from a platform dependent file.

Parameters:

filename

Sound file to load.

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Member Function Documentation

PSound& PSound::operator=

(

const PBYTEArray &

data

)

Set new data bytes for the sound.

Parameters:

data	New data for sound

PBoolean PSound::Load

(

const PFilePath &

filename

)

Load a platform dependent sound file (eg .WAV file for Win32) into the object. Note the whole file must able to be loaded into memory.

Also note that not all possible files are playable by this library. No format conversions between file and driver are performed.

Returns:

PTrue if the sound is loaded successfully.

Parameters:

filename

Sound file to load.

PBoolean PSound::Save

(

const PFilePath &

filename

)

Save a platform dependent sound file (eg .WAV file for Win32) from the object.

Returns:

PTrue if the sound is saved successfully.

Parameters:

filename

Sound file to load.

PBoolean PSound::Play

(

)

Play the sound on the default sound device.

PBoolean PSound::Play

(

const PString &

device

)

Play the sound to the specified sound device.

void PSound::SetFormat	(	unsigned	numChannels,
		unsigned	sampleRate,
		unsigned	bitsPerSample
	)

Set the internal sound format to linear PCM at the specification in the parameters.

Parameters:

numChannels	Number of channels eg mono/stereo
sampleRate	Samples per second
bitsPerSample	Number of bits per sample

unsigned PSound::GetEncoding

(

)

const [inline]

Get the current encoding. A value of 0 indicates linear PCM, any other value is platform dependent.

unsigned PSound::GetChannels

(

)

const [inline]

Get the number of channels (mono/stereo) in the sound.

unsigned PSound::GetSampleRate

(

)

const [inline]

Get the sample rate in samples per second.

unsigned PSound::GetSampleSize

(

)

const [inline]

Get the sample size in bits per sample.

DWORD PSound::GetErrorCode

(

)

const [inline]

Get the platform dependent error code from the last file load.

PINDEX PSound::GetFormatInfoSize

(

)

const [inline]

Get the size of the platform dependent format info.

const void* PSound::GetFormatInfoData

(

)

const [inline]

Get pointer to the platform dependent format info.

static PBoolean PSound::PlayFile	(	const PFilePath &	file,
		PBoolean	wait = PTrue
	)			[static]

Play a sound file to the default device. If the wait# parameter is PTrue then the function does not return until the file has been played. If PFalse then the sound play is begun asynchronously and the function returns immediately.

Returns:

PTrue if the sound is playing or has played.

Parameters:

file	Sound file to play.
wait	Flag to play sound synchronously.

static void PSound::Beep

(

)

[static]

Play the "standard" warning beep for the platform.

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Member Data Documentation

unsigned PSound::encoding [protected]

Format code.

unsigned PSound::numChannels [protected]

Number of channels eg mono/stereo.

unsigned PSound::sampleRate [protected]

Samples per second.

unsigned PSound::sampleSize [protected]

Number of bits per sample.

DWORD PSound::dwLastError [protected]

Last error code for Load()/Save() functions.

PBYTEArray PSound::formatInfo [protected]

Full info on the format (platform dependent).

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The documentation for this class was generated from the following file:

• sound.h

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